Lua Programming Help Thread

[lingon]

sorry to hear that, thats tuff luck man.

[SG57]

how do i say a number thro a number? like 1-100?

[lingon]

SG57, try this for that pixel thing you asked about.

pad = Controls.read()
If x>0 and x<50 and y>0 and y<50 and then
screen:blit(........

[SG57]

ya i kno but my cursor keeps freezing when i do and my picture wont blit unless i move it first so any help?

[lingon]

Hmm... perhaps its supposed to be WHEN or WHILE x>0 and x<50 and y>0 and y<50 and do
screen:blit(........
But I dont really know =(

[nathan42100]

How fast does a "while true do" loop go? loop everytime the screen refreshes?

[SG57]

it makes the luaplayer read what ever is in the while true do loop over infinently as fast as the processor can handle

[SG57]

any one have a menu example they could post? im looking 4 examples

[montrob]

im running 2.0. I go to lua player. I press circle on "smileys" lua script. nothing happens... psp doesnt freeze.. cuz if you press start it restarts the menu and evetything works fine.. heres the code (its my first program so dont be too mean) and yes all of my image placements are meant to be (0, 0)



System.usbDiskModeActivat e()

background = Image.load("background.jp g")
shot a = Image.load("shot a.jpg")
shot b= Image.load("shot b.jpg")
shot c = Image.load("shot c.jpg")
shot d = Image.load("shot d.jpg")
shot e = Image.load("shot e.jpg")
shot f = Image.load("shot f.jpg")
shot g = Image.load("shot g.jpg")
shot h = Image.load("shot h.jpg")
dribble a = Image.load("dribble a.jpg")
dribble b = Image.load("dribble b.jpg")
dribble c = Image.load("dribble c.jpg")

screen:blit (0, 0, background, false)
screen.waitVblankStart()
screen.flip()

while true do
screen:blit(0, 0, background, false)

pad = Controls.read()

if pad:square() then
screen:blit(0, 0, dribble a)
screen.flip()
screen:blit(0, 0, dribble b)
screen.flip()
screen:blit(0, 0, dribble c)
screen.flip()
end

if pad:circle() then
screen:blit(0, 0, shot a)
screen.flip()
screen:blit(0, 0, shot b)
screen.flip()
screen:blit(0, 0, shot c)
screen.flip()
screen:blit(0, 0, shot d)
screen.flip()
screen:blit(0, 0, shot e)
screen.flip()
screen:blit(0, 0, shot f)
screen.flip()
screen:blit(0, 0, shot g)
screen.flip()
screen:blit(0, 0, shot h)
screen.flip()
screen:blit (0, 0, background, false)
screen.waitVblankStart()
screen.flip()


end

[Slasher]

get rid of all those screen.flips in the while statement. Just need the one at the end

[Slasher]

System.usbDiskModeActivat e()

background = Image.load("background.jp g")
shot a = Image.load("shot a.jpg")
shot b= Image.load("shot b.jpg")
shot c = Image.load("shot c.jpg")
shot d = Image.load("shot d.jpg")
shot e = Image.load("shot e.jpg")
shot f = Image.load("shot f.jpg")
shot g = Image.load("shot g.jpg")
shot h = Image.load("shot h.jpg")
dribble a = Image.load("dribble a.jpg")
dribble b = Image.load("dribble b.jpg")
dribble c = Image.load("dribble c.jpg")


while true do
screen:blit(0, 0, background, false)

pad = Controls.read()

if pad:square() then
screen:blit(0, 0, dribble a)
screen:blit(0, 0, dribble b)
screen:blit(0, 0, dribble c)
end

if pad:circle() then
screen:blit(0, 0, shot a)
screen:blit(0, 0, shot b)
screen:blit(0, 0, shot c)
screen:blit(0, 0, shot d)
screen:blit(0, 0, shot e)
screen:blit(0, 0, shot f)
screen:blit(0, 0, shot g)
screen:blit(0, 0, shot h)
end

screen.waitVblankStart()
screen.flip()

end



NOTE: I'm also not sure if you can put spaces when you declare things. So if that doesn't work then get rid of all the space when you load the pictures

[montrob]

tried it with spaces in between, didnt' work. tried it without spaces.. still didn;t work... tried takin the usb activation code line.. didn't work.. could you put this on your psp and see if it runs and try to find out whats wrong. (its my first game so its gonna be lame)

http://rapidshare.de/files/9309628/Smileys.rar.html


ill see if any program can run on my psp besides the lua apps that come with the luaplayer.. if you still see something wrong help me though

[Slasher]

I would also reccomend not learnign to code on a 2.0. It is much more of a pain in the ass since you can't access USB and change the code instead of having to restart your psp every time.

[montrob]

ya but i have star wars battle front 2 that doesn't work with the version changer. could we talk on aim to help me? also see my post above to try the file please game and see if it works for you please.

[montrob]

I need help with my code. what it does is it has an image pop up gradually.. see image 1, 2, 3. then when you hit square a block hits the image coming down from the top of the screen. the images pop up and down fine, but the block will only come down after the image goes all through image 1,2,3,2,1. what i mean is that i hold down square and the block only appears for a few seconds, then the images come back up again, and the block won't appear. (im still holding square) help please.

background = Image.load("background.pn g")
left1 = Image.load("left1.png")
left2 = Image.load("left2.png")
left3 = Image.load("left3.png")
block = Image.load("block.png")

while true do
screen:blit(0, 0, background, false)

pad = Controls.read()

if pad:square() then
screen:blit(62, 34, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(62, 54, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(62, 74, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(62, 94, block)
screen.flip()
screen.waitVblankStart(5)
end

if pad:circle() then
screen:blit(190, 34, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(190, 54, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(190, 74, block)
screen.flip()
screen.waitVblankStart(5)
screen:blit(190, 94, block)
screen.flip()
screen.waitVblankStart(5)
end

screen:blit(0, 0, left1)
screen:flip()
screen.waitVblankStart(30 )
screen:blit(0, 0, left2)
screen:flip()
screen.waitVblankStart(30 )
screen:blit(0, 0, left3)
screen:flip()
screen.waitVblankStart(24 0)
screen:blit(0, 0, left2)
screen:flip()
screen.waitVblankStart(30 )
screen:blit(0, 0, left1)
screen:flip()
screen.waitVblankStart(30 )
end






EDIT: also if i put this in my code somewhere.. would it work? what im trying to do is if block's XY coordinates are greater than or equal to image3's coordinates.. then screen:blit etc....

block = 62 , 34
image3 = 96, 80
if block >= image3 then
screen:blit(0, 0, image2)
screen.flip()
screen.waitVblankStart(30 )
screen:blit(0, 0, image1)
screen.flip()
screen.waitVblankStart(30 )
end

[lingon]

Well, that thing with the block dissapearing is proboably because of the waitvblankstart thing. Use loops like while true do instead, or functions. The reason that the block only will come out once is that you only tell it to. You write if pad:square only once so it will only do that once. I'd say that build it all into a function, cuz thay can be called as many times as you want.
Besides, there are better ways of displaying graphics, that I presume you are doing, then to blit alot of images. Check this site http://wiki.ps2dev.org/psp:lua_player

[lingon]

Try it like this

pad = Controls.read()

if pad:square() then
           square()
end

function square()
         screen:blit(62, 34, block)
         screen.flip()
         screen.waitVblankStart(5) 

         screen:blit(62, 54, block)
         screen.flip()
         screen.waitVblankStart(5) 

        screen:blit(62, 74, block)
        screen.flip()
        screen.waitVblankStart(5) 

        screen:blit(62, 94, block)
        screen.flip()
        screen.waitVblankStart(5) 
end

[FreePlay]

I'm trying to get info on the Socket.connect() function, but very little is available. I found someone who had used it as:

httpsock, error = Socket.connect(server, port)

What is being stored in "error"???

[lingon]

Does anybody know how to tell the math.random function to do a certain thing if the number generated id BETWEEN for instance 1 and 2?

[FreePlay]

I'm not sure what the syntax of the math.random function is, but I assume it generates a decimal number between 0 and 1. If so, here's how to generate a number between X and Y:

math.random() * (Y - X) + X

e.g. between 5 and 10:
math.random() * (10 - 5) + 5 --> math.random() * 5 + 5

This will generate a number between 0 and 1, then multiply by 5, thus giving you a number between 0 and 5. Then you add 5, thus forcing the range up to between 5 and 10.

Hope this helps!

[lingon]

Aaah! Thanks alot dude! =)

[montrob]

anyone know what might be wrong with this code? it wont load on my psp

background = Image.load("background.pn g")
white1 = Image.load("white1.png")
white2 = Image.load("white2.png")
white3 = Image.load("white3.png")
white4 = Image.load("white4.png")

while true do
screen:blit(0, 0, background, false)

function white1()
screen:blit(0, 0, white1)
screen.flip()
screen.waitVblankStart()
end

function white2()
screen:blit(0, 0, white2)
screen.flip()
screen.waitVblankStart(12 0)
end

function white3()
screen:blit(0, 0, white3)
screen.flip()
screen.waitVblankStart(12 0)
end

function white4()
screen:blit(0, 0, white4)
screen.flip()
screen.waitVblankStart(12 0)
end

pad = Controls.read()

if pad:square() then
white1()
end

if pad:circle() then
white2()
end

if pad:triangle() then
white3()
end

if pad:cross() then
white4()
end

[lingon]

What does the error message say? Oh, and you never flip the backround =)

[XteticX]

montrob, this would make it smaller at least. Dont know if it would fix your prob tho.

background=Image.load("background.png")
white1=Image.load("white1.png")
white2=Image.load("white2.png")
white3=Image.load("white3.png")
white4=Image.load("white4.png")

function white(IMAGE)
 screen:blit(0,0,IMAGE)
 screen.waitVblankStart(120) -keep on screen
end

while true do
pad=Controls.read()
 screen:blit(0, 0, background, false)
 if pad:square() then white(white1)
 elseif pad:circle() then white(white2)
 elseif pad:triangle() then white(white3)
 elseif pad:cross() then white(white4)
 end
 screen.waitVblankStart()
 screen.flip()
end

[Hooger]

i still cant get it to work......... i copy the new eboot.pbp file but when i open the luaplayer using the eboot loader it says Kernal modes is suggested click X to continue anyways. then it says no script file found? am i being stupid (prolly am) but ya thats about it...

EDIT: original thread ----->HERE

thats me ^^ need help...


.....sadly complete n00b please be gentle.....

[SG57]

i modded my xbox yay! now i have a better internet browser! i shall continue my LUA project!

[KINGOFNOOBS]

hmm i need some help on how to press a key and it displays Text this is my code right now

if pad:cross() then
screen:print(40, 150, cross "Welcome to the Tutorial For pspBaller, blue)
screen.flip()
end

[montrob]

hmm i need some help on how to press a key and it displays Text this is my code right now

if pad:cross() then
screen:print(40, 150, cross "Welcome to the Tutorial For pspBaller, blue)
screen.flip()
end

try this if it doesnt work let me know

if pad:cross() then
screen:print(40, 150, "Welcome to the Tutorial For pspBaller, blue)
screen.flip()
screen.waitVblankStart()
end

and you do have

 pad = Controls.read

in there right?

[KINGOFNOOBS]

doesnt work... heres all my code

yellow = Color.new(255, 255, 0)
blue = Color.new(0, 0, 255)
orange = Color.new(223, 88, 6)
grey = Color.new(94, 97, 111)
black = Color.new(0, 0, 0)

screen:print(150, 130, "Welcome To pspBaller Beta!", blue)
screen.flip()

while true do
screen.waitVblankStart(180)

screen:clear()
screen:print(40, 150, "Thank you for waiting, now Press X for Tutorial", blue)
screen.flip()

pad = Controls.read()

if pad:cross() then
screen:print(40, 150, "Welcome to the Tutorial For pspBaller, blue)
screen.flip()
screen.waitVblankStart()
end



end

[montrob]

there ya go. added a background too =) just make sure you hold "X" as soon as it says press "X", until the text you want to appear appears, just to make sure it works.

yellow = Color.new(255, 255, 0)
blue = Color.new(0, 0, 255)
orange = Color.new(223, 88, 6)
grey = Color.new(94, 97, 111)
black = Color.new(0, 0, 0)
background = Image.load("background.png")

screen:blit(0, 0, background, false)
screen.flip()
screen.waitVblankStart(120)

screen:blit(0, 0, background, false)
screen:print(150, 130, "Welcome To pspBaller Beta!", blue)
screen.flip()
screen.waitVblankStart(180)


screen:blit(0, 0, background, false)
screen:print(40, 150, "Thank you for waiting, now Press X for Tutorial", blue)
screen.flip()
screen.waitVblankStart(120)

pad = Controls.read()

if pad:cross() then
screen:blit(0, 0, background, false)
screen:print(40, 150, "Welcome to the Tutorial For pspBaller", blue)
screen.flip()
screen.waitVblankStart(400)
end

welcome :)